While it remains uncertain whether the buyer intends to retain ownership or sell it, the immediate inclination to have the card authenticated implies that a sale might be on the cards, pun intended
WotC keeps giving the eldrazi love, and we can play colored ones, too
The type-changing ability that can make The Warring Triad not be a creature functions only on the battlefield
On its own it can dash in and deal 6 damage, or it can crash for 4 while backing up another creature and granting that double strike instead
A Flash counter and or blocker, there's some very fun way to use this, especially during things where your opponent may assume they're safe to be greedy, such as on a turn-ending before untapping fully, and I agree with Loxi: players like to tap out a lot carelessly